US5224011A - Multifunction protective relay system - Google Patents
Multifunction protective relay system Download PDFInfo
- Publication number
- US5224011A US5224011A US07/687,754 US68775491A US5224011A US 5224011 A US5224011 A US 5224011A US 68775491 A US68775491 A US 68775491A US 5224011 A US5224011 A US 5224011A
- Authority
- US
- United States
- Prior art keywords
- relay system
- digital signal
- voltage
- protective relay
- analog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H2071/006—Provisions for user interfaces for electrical protection devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
Abstract
Description
TABLE 1 ______________________________________ POSITION OFSWITCH 20 # OPTION ON (Down) OFF (Up) ______________________________________ 1 Not for user selection. 2 Calibrate MPRS Normal Opera- CalibrateRelay tion 3 Diagonstic Mode Normal Opera-Diagnostic Mode tion 4 Power Reversal A reversal of The total 3-phase power power flow must be in the reverse in any one direction to initiate relay phase initiates operation (PA + PB + relay operation PB < 0) (PA or PB or PC < 0) 5 Basic Vt Inputs Line-to-Line Line-to-Ground 6 Vt Secondary 69 V ac 120V ac Voltage 7Rated System 50 Hz 60 Hz (Used in this Frequency preferred embodiment) 8 Basis for RMS Total Wave- Fundamental Frequency Calculations of form Only Voltage and (Including Current Harmonics) ______________________________________
TABLE 2 ______________________________________ CURRENT CHANNEL TAP SETTING VALUE PGA GAIN ______________________________________ 0.5 amps to 1.45amps 8 1.5 amps to 2.9amps 4 3 amps to 5.8amps 2 6 amps to 12amps 1 ______________________________________
TABLE 3 __________________________________________________________________________ NON-RECURSIVE RECURSIVE __________________________________________________________________________ ##STR1## Z'.sub.RMS.sbsb.k = Z'.sub.RMS.sbsb.k-1 + Z.sub.k.sup.2 - Z.sup.2 .sub.k-4 ##STR2## ##STR3## ##STR4## Z.sub.RMS.sbsb.0 = 42.42 ##STR5## ##STR6## Z.sub.RMS.sbsb.2 = 94.86 ##STR7## ##STR8## Z.sub.RMS.sbsb.2 = 94.86 ##STR9## ##STR10## Z.sub.RMS.sbsb.3 = 120 ##STR11## ##STR12## Z.sub.RMS.sbsb.4 = 120 Z.sub.RMS.sbsb.5 = 120 Z'.sub.RMS.sbsb.5 = 57593.52 Z.sub.RMS.sbsb.5 = 120 . . . . . . . . . __________________________________________________________________________
S=VI*=P+jQ
P.sub.T +jQ.sub.T =V.sub.a I.sub.a *+V.sub.b I.sub.b *+V.sub.c I.sub.c *
P=Minimum of (P.sub.a, P.sub.b, and P.sub.c)
P=-0.197
P.sub.T +jQ.sub.T =V.sub.ac I*.sub.a +V.sub.bc I*.sub.b
P.sub.T +jQ.sub.T =[(1∠0°-1∠120°)0.5∠100°]+[(1∠-120°-1∠120°)0.6∠225°]=-0.43867+j1.5486
U.sub.k =U.sub.k-1 +f(I.sub.k)
f'(I.sup.2)=A.sub.0 +A.sub.1 (I.sup.2)+A.sub.2 (I.sup.2).sup.2
I.sub.2.sup.2 t=K
I.sub.a =I.sub.a.sbsb.R +jI.sub.a.sbsb.I and
I.sub.b =I.sub.b.sbsb.R +jI.sub.b.sbsb.I
=0.60×2.8 amps=1.68 amps.
Claims (33)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/687,754 US5224011A (en) | 1991-04-19 | 1991-04-19 | Multifunction protective relay system |
CA002066099A CA2066099C (en) | 1991-04-19 | 1992-04-15 | Multifunction protective relay system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/687,754 US5224011A (en) | 1991-04-19 | 1991-04-19 | Multifunction protective relay system |
Publications (1)
Publication Number | Publication Date |
---|---|
US5224011A true US5224011A (en) | 1993-06-29 |
Family
ID=24761715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/687,754 Expired - Lifetime US5224011A (en) | 1991-04-19 | 1991-04-19 | Multifunction protective relay system |
Country Status (2)
Country | Link |
---|---|
US (1) | US5224011A (en) |
CA (1) | CA2066099C (en) |
Cited By (114)
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US5428549A (en) * | 1993-05-28 | 1995-06-27 | Abb Power T&D Company | Transmission line fault location system |
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US5544064A (en) * | 1994-05-20 | 1996-08-06 | Beckwith; Robert W. | Apparatus and method for sampling signals synchronous with analog to digital converter |
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US5828576A (en) * | 1994-12-30 | 1998-10-27 | Cd Power Measurement Limited | Power monitor apparatus and method with object oriented structure |
US5835325A (en) * | 1992-05-12 | 1998-11-10 | Merlin Gerin | Electronic trip device comprising a correcting device |
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US6055145A (en) * | 1990-12-28 | 2000-04-25 | Eaton Corporation | Overcurrent protection device with visual indicators for trip and programming functions |
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US6055145A (en) * | 1990-12-28 | 2000-04-25 | Eaton Corporation | Overcurrent protection device with visual indicators for trip and programming functions |
US5835325A (en) * | 1992-05-12 | 1998-11-10 | Merlin Gerin | Electronic trip device comprising a correcting device |
US5604838A (en) * | 1992-09-15 | 1997-02-18 | Samsung Electronics Co., Ltd. | Method and apparatus for recording and reading a multiplexed video signal |
US5471359A (en) * | 1993-02-25 | 1995-11-28 | Impco Inc. | Polyphase current monitor and control system |
US5428549A (en) * | 1993-05-28 | 1995-06-27 | Abb Power T&D Company | Transmission line fault location system |
US5544064A (en) * | 1994-05-20 | 1996-08-06 | Beckwith; Robert W. | Apparatus and method for sampling signals synchronous with analog to digital converter |
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US5878375A (en) * | 1994-10-17 | 1999-03-02 | Newton; Timothy T. | Data transfer switching device and method of use therefore |
US5828576A (en) * | 1994-12-30 | 1998-10-27 | Cd Power Measurement Limited | Power monitor apparatus and method with object oriented structure |
US6185508B1 (en) | 1994-12-30 | 2001-02-06 | Power Measurement, Ltd. | Power meter for determining parameters of multi-phase power lines |
US5736847A (en) * | 1994-12-30 | 1998-04-07 | Cd Power Measurement Limited | Power meter for determining parameters of muliphase power lines |
US6075368A (en) * | 1995-03-10 | 2000-06-13 | Cooper Industries, Inc. | Method of improving fault current measurement accuracy on electronic reclosure control |
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